Форма различия кода между Oracle и MySQL - PullRequest
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Форма различия кода между Oracle и MySQL

0 голосов
/ 22 февраля 2019

Я конвертировал коды в Oracle в MYSQL через http://www.sqlines.com/online. Коды совершенно правильны в Oracle (таблицы и данные созданы без сообщений об ошибках), но когда я копирую коды и вставляю в MYSQL, появляется сообщение об ошибке:

Ошибка SQL [1005] [HY000]: Невозможно создать таблицу universityddl. faculty (номер ошибки: 150 «Ограничение внешнего ключа сформировано неправильно»).

Не могу понять, в чем причина, потому что я новичок в СУБД.Я ценю, если кто-нибудь может помочь.

Код в Oracle: 

CREATE TABLE Faculty ( 
    FacNo         CHAR(11)      NOT NULL, 
    FacFirstName  VARCHAR(30)   NOT NULL, 
    FacLastName   VARCHAR(30)   NOT NULL, 
    FacCity       VARCHAR(30)   NOT NULL, 
    FacState      CHAR(2)       NOT NULL, 
    FacDept       CHAR(6)       NULL, 
    FacRank       CHAR(4)       NULL, 
    FacSalary     DECIMAL(10,2) NULL, 
    FacSupervisor CHAR(11)      NULL, 
    FacHireDate   DATE      NULL, 
    FacZipCode    CHAR(10)      NOT NULL, 
    CONSTRAINT FacultyPK PRIMARY KEY (FacNo),  
    CONSTRAINT SupervisorFK FOREIGN KEY (FacSupervisor) REFERENCES Faculty
);

CREATE TABLE Course ( 
    CourseNo      CHAR(6)       NOT NULL, 
    CrsDesc       VARCHAR(50)   NOT NULL, 
    CrsUnits      INTEGER       NULL, 
    CONSTRAINT CoursePK PRIMARY KEY (CourseNo) 
);

CREATE TABLE Offering ( 
    OfferNo       INTEGER       NOT NULL, 
    CourseNo      CHAR(6)       NOT NULL, 
    OffTerm       CHAR(6)       NOT NULL, 
    OffYear       INTEGER       NOT NULL, 
    OffLocation   VARCHAR(30)   NULL, 
    OffTime       VARCHAR(10)   NULL, 
    FacNo         CHAR(11)      NULL, 
    OffDays       CHAR(4)       NULL, 
    CONSTRAINT OfferingPK PRIMARY KEY (OfferNo), 
    CONSTRAINT CourseFK FOREIGN KEY (CourseNo) REFERENCES Course, 
    CONSTRAINT FacultyFK FOREIGN KEY (FacNo) REFERENCES Faculty
);

CREATE TABLE Student ( 
    StdNo         CHAR(11)      NOT NULL, 
    StdFirstName  VARCHAR(30)   NOT NULL, 
    StdLastName   VARCHAR(30)   NOT NULL, 
    StdCity       VARCHAR(30)   NOT NULL, 
    StdState      CHAR(2)       NOT NULL, 
    StdZip        CHAR(10)      NOT NULL, 
    StdMajor      CHAR(6)       NULL, 
    StdClass      CHAR(2)       NULL, 
    StdGPA        DECIMAL(3,2)  NULL, 
    CONSTRAINT StudentPk PRIMARY KEY (StdNo) 
);

CREATE TABLE Enrollment( 
    OfferNo       INTEGER       NOT NULL, 
    StdNo         CHAR(11)      NOT NULL, 
    EnrGrade      DECIMAL(3,2)  NULL, 
    CONSTRAINT EnrollmentPK PRIMARY KEY (OfferNo,StdNo), 
    CONSTRAINT OfferingFK FOREIGN KEY (OfferNo) REFERENCES Offering 
                      ON DELETE CASCADE,
    CONSTRAINT StudentFK FOREIGN KEY (StdNo) REFERENCES Student 
                      ON DELETE CASCADE
);

INSERT INTO Faculty VALUES ('543210987','VICTORIA','EMMANUEL','BOTHELL','WA','MS','PROF',120000.0,NULL,'15/Apr/1998','98011-2242');

INSERT INTO Faculty VALUES ('654321098','LEONARD','FIBON','SEATTLE','WA','MS','ASSC',70000.00,'543210987','1/May/1996','98121-0094');

INSERT INTO Faculty VALUES ('098765432','LEONARD','VINCE','SEATTLE','WA','MS','ASST',35000.00,'654321098','10/Apr/1997','98111-9921');

INSERT INTO Faculty VALUES ('765432109','NICKI','MACON','BELLEVUE','WA','FIN','PROF',65000.00,NULL,'11/Apr/1999','98015-9945');

INSERT INTO Faculty VALUES ('876543210','CRISTOPHER','COLAN','SEATTLE','WA','MS','ASST',40000.00,'654321098','1/Mar/2001','98114-1332');

INSERT INTO Faculty VALUES ('987654321','JULIA','MILLS','SEATTLE','WA','FIN','ASSC',75000.00,'765432109','15/Mar/2002','98114-9954');

INSERT INTO Course VALUES ('FIN300','FUNDAMENTALS OF FINANCE',4);

INSERT INTO Course VALUES ('FIN450','PRINCIPLES OF INVESTMENTS',4);

INSERT INTO Course VALUES ('FIN480','CORPORATE FINANCE',4);

INSERT INTO Course VALUES ('IS320','FUNDAMENTALS OF BUSINESS PROGRAMMING',4);

INSERT INTO Course VALUES ('IS460','SYSTEMS ANALYSIS',4);

INSERT INTO Course VALUES ('IS470','BUSINESS DATA COMMUNICATIONS',4);

INSERT INTO Course VALUES ('IS480','FUNDAMENTALS OF DATABASE MANAGEMENT',4);

INSERT INTO Offering VALUES (1111,'IS320','SUMMER',2010,'BLM302','10:30:00',NULL,'MW');

INSERT INTO Offering VALUES (1234,'IS320','FALL',2009,'BLM302','10:30:00','098765432','MW');

INSERT INTO Offering VALUES (2222,'IS460','SUMMER',2009,'BLM412','13:30:00',NULL,'TTH');

INSERT INTO Offering VALUES (3333,'IS320','SPRING',2010,'BLM214','8:30:00','098765432','MW');

INSERT INTO Offering VALUES (4321,'IS320','FALL',2009,'BLM214','15:30:00','098765432','TTH');

INSERT INTO Offering VALUES (4444,'IS320','WINTER',2010,'BLM302','15:30:00','543210987','TTH');

INSERT INTO Offering VALUES (5555,'FIN300','WINTER',2010,'BLM207','8:30:00','765432109','MW');

INSERT INTO Offering VALUES (5678,'IS480','WINTER',2010,'BLM302','10:30:00','987654321','MW');

INSERT INTO Offering VALUES (5679,'IS480','SPRING',2010,'BLM412','15:30:00','876543210','TTH');

INSERT INTO Offering VALUES (6666,'FIN450','WINTER',2010,'BLM212','10:30:00','987654321','TTH');

INSERT INTO Offering VALUES (7777,'FIN480','SPRING',2010,'BLM305','13:30:00','765432109','MW');

INSERT INTO Offering VALUES (8888,'IS320','SUMMER',2010,'BLM405','13:30:00','654321098','MW');

INSERT INTO Offering VALUES (9876,'IS460','SPRING',2010,'BLM307','13:30:00','654321098','TTH');

INSERT INTO Student VALUES ('123456789','HOMER','WELLS','SEATTLE','WA','98121-1111','IS','FR',3.00);

INSERT INTO Student VALUES ('124567890','BOB','NORBERT','BOTHELL','WA','98011-2121','FIN','JR',2.70);

INSERT INTO Student VALUES ('234567890','CANDY','KENDALL','TACOMA','WA','99042-3321','ACCT','JR',3.50);

INSERT INTO Student VALUES ('345678901','WALLY','KENDALL','SEATTLE','WA','98123-1141','IS','SR',2.80);

INSERT INTO Student VALUES ('456789012','JOE','ESTRADA','SEATTLE','WA','98121-2333','FIN','SR',3.20);

INSERT INTO Student VALUES ('567890123','MARIAH','DODGE','SEATTLE','WA','98114-0021','IS','JR',3.60);

INSERT INTO Student VALUES ('678901234','TESS','DODGE','REDMOND','WA','98116-2344','ACCT','SO',3.30);

INSERT INTO Student VALUES ('789012345','ROBERTO','MORALES','SEATTLE','WA','98121-2212','FIN','JR',2.50);

INSERT INTO Student VALUES ('876543210','CRISTOPHER','COLAN','SEATTLE','WA','98114-1332','IS','SR',4.00);

INSERT INTO Student VALUES ('890123456','LUKE','BRAZZI','SEATTLE','WA','98116-0021','IS','SR',2.20);

INSERT INTO Student VALUES ('901234567','WILLIAM','PILGRIM','BOTHELL','WA','98113-1885','IS','SO',3.80);

INSERT INTO Enrollment VALUES (1234,'123456789',3.30);

INSERT INTO Enrollment VALUES (1234,'234567890',3.50);

INSERT INTO Enrollment VALUES (1234,'345678901',3.20);

INSERT INTO Enrollment VALUES (1234,'456789012',3.10);

INSERT INTO Enrollment VALUES (1234,'567890123',3.80);

INSERT INTO Enrollment VALUES (1234,'678901234',3.40);

INSERT INTO Enrollment VALUES (4321,'123456789',3.50);

INSERT INTO Enrollment VALUES (4321,'124567890',3.20);

INSERT INTO Enrollment VALUES (4321,'789012345',3.50);

INSERT INTO Enrollment VALUES (4321,'876543210',3.10);

INSERT INTO Enrollment VALUES (4321,'890123456',3.40);

INSERT INTO Enrollment VALUES (4321,'901234567',3.10);

INSERT INTO Enrollment VALUES (5555,'123456789',3.20);

INSERT INTO Enrollment VALUES (5555,'124567890',2.70);

INSERT INTO Enrollment VALUES (5678,'123456789',3.20);

INSERT INTO Enrollment VALUES (5678,'234567890',2.80);

INSERT INTO Enrollment VALUES (5678,'345678901',3.30);

INSERT INTO Enrollment VALUES (5678,'456789012',3.40);

INSERT INTO Enrollment VALUES (5678,'567890123',2.60);

INSERT INTO Enrollment VALUES (5679,'123456789',2.00);

INSERT INTO Enrollment VALUES (5679,'124567890',3.70);

INSERT INTO Enrollment VALUES (5679,'678901234',3.30);

INSERT INTO Enrollment VALUES (5679,'789012345',3.80);

INSERT INTO Enrollment VALUES (5679,'890123456',2.90);

INSERT INTO Enrollment VALUES (5679,'901234567',3.10);

INSERT INTO Enrollment VALUES (6666,'234567890',3.10);

INSERT INTO Enrollment VALUES (6666,'567890123',3.60);

INSERT INTO Enrollment VALUES (7777,'876543210',3.40);

INSERT INTO Enrollment VALUES (7777,'890123456',3.70);

INSERT INTO Enrollment VALUES (7777,'901234567',3.40);

INSERT INTO Enrollment VALUES (9876,'124567890',3.50);

INSERT INTO Enrollment VALUES (9876,'234567890',3.20);

INSERT INTO Enrollment VALUES (9876,'345678901',3.20);

INSERT INTO Enrollment VALUES (9876,'456789012',3.40);

INSERT INTO Enrollment VALUES (9876,'567890123',2.60);

INSERT INTO Enrollment VALUES (9876,'678901234',3.30);

INSERT INTO Enrollment VALUES (9876,'901234567',4.00);

Код после преобразования (в МОЙ SQL): 

CREATE TABLE Faculty ( 
    FacNo         CHAR(11)      NOT NULL, 
    FacFirstName  VARCHAR(30)   NOT NULL, 
    FacLastName   VARCHAR(30)   NOT NULL, 
    FacCity       VARCHAR(30)   NOT NULL, 
    FacState      CHAR(2)       NOT NULL, 
    FacDept       CHAR(6)       NULL, 
    FacRank       CHAR(4)       NULL, 
    FacSalary     DECIMAL(10,2) NULL, 
    FacSupervisor CHAR(11)      NULL, 
    FacHireDate   DATE      NULL, 
    FacZipCode    CHAR(10)      NOT NULL, 
    CONSTRAINT FacultyPK PRIMARY KEY (FacNo),  
    CONSTRAINT SupervisorFK FOREIGN KEY (FacSupervisor) REFERENCES Faculty
);

CREATE TABLE Course ( 
    CourseNo      CHAR(6)       NOT NULL, 
    CrsDesc       VARCHAR(50)   NOT NULL, 
    CrsUnits      INTEGER       NULL, 
    CONSTRAINT CoursePK PRIMARY KEY (CourseNo) 
);

CREATE TABLE Offering ( 
    OfferNo       INTEGER       NOT NULL, 
    CourseNo      CHAR(6)       NOT NULL, 
    OffTerm       CHAR(6)       NOT NULL, 
    OffYear       INTEGER       NOT NULL, 
    OffLocation   VARCHAR(30)   NULL, 
    OffTime       VARCHAR(10)   NULL, 
    FacNo         CHAR(11)      NULL, 
    OffDays       CHAR(4)       NULL, 
    CONSTRAINT OfferingPK PRIMARY KEY (OfferNo), 
    CONSTRAINT CourseFK FOREIGN KEY (CourseNo) REFERENCES Course, 
    CONSTRAINT FacultyFK FOREIGN KEY (FacNo) REFERENCES Faculty
);

CREATE TABLE Student ( 
    StdNo         CHAR(11)      NOT NULL, 
    StdFirstName  VARCHAR(30)   NOT NULL, 
    StdLastName   VARCHAR(30)   NOT NULL, 
    StdCity       VARCHAR(30)   NOT NULL, 
    StdState      CHAR(2)       NOT NULL, 
    StdZip        CHAR(10)      NOT NULL, 
    StdMajor      CHAR(6)       NULL, 
    StdClass      CHAR(2)       NULL, 
    StdGPA        DECIMAL(3,2)  NULL, 
    CONSTRAINT StudentPk PRIMARY KEY (StdNo) 
);

CREATE TABLE Enrollment( 
    OfferNo       INTEGER       NOT NULL, 
    StdNo         CHAR(11)      NOT NULL, 
    EnrGrade      DECIMAL(3,2)  NULL, 
    CONSTRAINT EnrollmentPK PRIMARY KEY (OfferNo,StdNo), 
    CONSTRAINT OfferingFK FOREIGN KEY (OfferNo) REFERENCES Offering 
                      ON DELETE CASCADE,
    CONSTRAINT StudentFK FOREIGN KEY (StdNo) REFERENCES Student 
                      ON DELETE CASCADE
);

INSERT INTO Faculty VALUES ('543210987','VICTORIA','EMMANUEL','BOTHELL','WA','MS','PROF',120000.0,NULL,'15/Apr/1998','98011-2242');

INSERT INTO Faculty VALUES ('654321098','LEONARD','FIBON','SEATTLE','WA','MS','ASSC',70000.00,'543210987','1/May/1996','98121-0094');

INSERT INTO Faculty VALUES ('098765432','LEONARD','VINCE','SEATTLE','WA','MS','ASST',35000.00,'654321098','10/Apr/1997','98111-9921');

INSERT INTO Faculty VALUES ('765432109','NICKI','MACON','BELLEVUE','WA','FIN','PROF',65000.00,NULL,'11/Apr/1999','98015-9945');

INSERT INTO Faculty VALUES ('876543210','CRISTOPHER','COLAN','SEATTLE','WA','MS','ASST',40000.00,'654321098','1/Mar/2001','98114-1332');

INSERT INTO Faculty VALUES ('987654321','JULIA','MILLS','SEATTLE','WA','FIN','ASSC',75000.00,'765432109','15/Mar/2002','98114-9954');

INSERT INTO Course VALUES ('FIN300','FUNDAMENTALS OF FINANCE',4);

INSERT INTO Course VALUES ('FIN450','PRINCIPLES OF INVESTMENTS',4);

INSERT INTO Course VALUES ('FIN480','CORPORATE FINANCE',4);

INSERT INTO Course VALUES ('IS320','FUNDAMENTALS OF BUSINESS PROGRAMMING',4);

INSERT INTO Course VALUES ('IS460','SYSTEMS ANALYSIS',4);

INSERT INTO Course VALUES ('IS470','BUSINESS DATA COMMUNICATIONS',4);

INSERT INTO Course VALUES ('IS480','FUNDAMENTALS OF DATABASE MANAGEMENT',4);

INSERT INTO Offering VALUES (1111,'IS320','SUMMER',2010,'BLM302','10:30:00',NULL,'MW');

INSERT INTO Offering VALUES (1234,'IS320','FALL',2009,'BLM302','10:30:00','098765432','MW');

INSERT INTO Offering VALUES (2222,'IS460','SUMMER',2009,'BLM412','13:30:00',NULL,'TTH');

INSERT INTO Offering VALUES (3333,'IS320','SPRING',2010,'BLM214','8:30:00','098765432','MW');

INSERT INTO Offering VALUES (4321,'IS320','FALL',2009,'BLM214','15:30:00','098765432','TTH');

INSERT INTO Offering VALUES (4444,'IS320','WINTER',2010,'BLM302','15:30:00','543210987','TTH');

INSERT INTO Offering VALUES (5555,'FIN300','WINTER',2010,'BLM207','8:30:00','765432109','MW');

INSERT INTO Offering VALUES (5678,'IS480','WINTER',2010,'BLM302','10:30:00','987654321','MW');

INSERT INTO Offering VALUES (5679,'IS480','SPRING',2010,'BLM412','15:30:00','876543210','TTH');

INSERT INTO Offering VALUES (6666,'FIN450','WINTER',2010,'BLM212','10:30:00','987654321','TTH');

INSERT INTO Offering VALUES (7777,'FIN480','SPRING',2010,'BLM305','13:30:00','765432109','MW');

INSERT INTO Offering VALUES (8888,'IS320','SUMMER',2010,'BLM405','13:30:00','654321098','MW');

INSERT INTO Offering VALUES (9876,'IS460','SPRING',2010,'BLM307','13:30:00','654321098','TTH');

INSERT INTO Student VALUES ('123456789','HOMER','WELLS','SEATTLE','WA','98121-1111','IS','FR',3.00);

INSERT INTO Student VALUES ('124567890','BOB','NORBERT','BOTHELL','WA','98011-2121','FIN','JR',2.70);

INSERT INTO Student VALUES ('234567890','CANDY','KENDALL','TACOMA','WA','99042-3321','ACCT','JR',3.50);

INSERT INTO Student VALUES ('345678901','WALLY','KENDALL','SEATTLE','WA','98123-1141','IS','SR',2.80);

INSERT INTO Student VALUES ('456789012','JOE','ESTRADA','SEATTLE','WA','98121-2333','FIN','SR',3.20);

INSERT INTO Student VALUES ('567890123','MARIAH','DODGE','SEATTLE','WA','98114-0021','IS','JR',3.60);

INSERT INTO Student VALUES ('678901234','TESS','DODGE','REDMOND','WA','98116-2344','ACCT','SO',3.30);

INSERT INTO Student VALUES ('789012345','ROBERTO','MORALES','SEATTLE','WA','98121-2212','FIN','JR',2.50);

INSERT INTO Student VALUES ('876543210','CRISTOPHER','COLAN','SEATTLE','WA','98114-1332','IS','SR',4.00);

INSERT INTO Student VALUES ('890123456','LUKE','BRAZZI','SEATTLE','WA','98116-0021','IS','SR',2.20);

INSERT INTO Student VALUES ('901234567','WILLIAM','PILGRIM','BOTHELL','WA','98113-1885','IS','SO',3.80);

INSERT INTO Enrollment VALUES (1234,'123456789',3.30);

INSERT INTO Enrollment VALUES (1234,'234567890',3.50);

INSERT INTO Enrollment VALUES (1234,'345678901',3.20);

INSERT INTO Enrollment VALUES (1234,'456789012',3.10);

INSERT INTO Enrollment VALUES (1234,'567890123',3.80);

INSERT INTO Enrollment VALUES (1234,'678901234',3.40);

INSERT INTO Enrollment VALUES (4321,'123456789',3.50);

INSERT INTO Enrollment VALUES (4321,'124567890',3.20);

INSERT INTO Enrollment VALUES (4321,'789012345',3.50);

INSERT INTO Enrollment VALUES (4321,'876543210',3.10);

INSERT INTO Enrollment VALUES (4321,'890123456',3.40);

INSERT INTO Enrollment VALUES (4321,'901234567',3.10);

INSERT INTO Enrollment VALUES (5555,'123456789',3.20);

INSERT INTO Enrollment VALUES (5555,'124567890',2.70);

INSERT INTO Enrollment VALUES (5678,'123456789',3.20);

INSERT INTO Enrollment VALUES (5678,'234567890',2.80);

INSERT INTO Enrollment VALUES (5678,'345678901',3.30);

INSERT INTO Enrollment VALUES (5678,'456789012',3.40);

INSERT INTO Enrollment VALUES (5678,'567890123',2.60);

INSERT INTO Enrollment VALUES (5679,'123456789',2.00);

INSERT INTO Enrollment VALUES (5679,'124567890',3.70);

INSERT INTO Enrollment VALUES (5679,'678901234',3.30);

INSERT INTO Enrollment VALUES (5679,'789012345',3.80);

INSERT INTO Enrollment VALUES (5679,'890123456',2.90);

INSERT INTO Enrollment VALUES (5679,'901234567',3.10);

INSERT INTO Enrollment VALUES (6666,'234567890',3.10);

INSERT INTO Enrollment VALUES (6666,'567890123',3.60);

INSERT INTO Enrollment VALUES (7777,'876543210',3.40);

INSERT INTO Enrollment VALUES (7777,'890123456',3.70);

INSERT INTO Enrollment VALUES (7777,'901234567',3.40);

INSERT INTO Enrollment VALUES (9876,'124567890',3.50);

INSERT INTO Enrollment VALUES (9876,'234567890',3.20);

INSERT INTO Enrollment VALUES (9876,'345678901',3.20);

INSERT INTO Enrollment VALUES (9876,'456789012',3.40);

INSERT INTO Enrollment VALUES (9876,'567890123',2.60);

INSERT INTO Enrollment VALUES (9876,'678901234',3.30);

INSERT INTO Enrollment VALUES (9876,'901234567',4.00);

Ответы [ 2 ]

0 голосов
/ 22 февраля 2019

1) Как ответил Ник, синтаксис внешнего ключа необходимо исправить.Существует 5 объявлений внешнего ключа для изменения: 

CREATE TABLE Faculty ( 
    ...
    CONSTRAINT SupervisorFK FOREIGN KEY (FacSupervisor) REFERENCES Faculty(FacNo)
);

CREATE TABLE Offering ( 
    ...
    CONSTRAINT CourseFK FOREIGN KEY (CourseNo) REFERENCES Course(CourseNo),
    CONSTRAINT FacultyFK FOREIGN KEY (FacNo) REFERENCES Faculty(FacNo)
);

CREATE TABLE Enrollment( 
    ....
    CONSTRAINT OfferingFK FOREIGN KEY (OfferNo) REFERENCES Offering(OfferNo) 
        ON DELETE CASCADE,
    CONSTRAINT StudentFK FOREIGN KEY (StdNo) REFERENCES Student(StdNo) 
        ON DELETE CASCADE
);

CONSTRAINT CourseFK FOREIGN KEY (CourseNo) REFERENCES Course(CourseNo)

Вместо: 

CONSTRAINT CourseFK FOREIGN KEY (CourseNo) REFERENCES Course

2) Когда дело доходит до вставки данных, следует ожидать проблем при обработке дат.Вы даете значения MySQL, такие как '1/Mar/2001' для столбца с типом данных date (а именно Faculty.FacHireDate): он не примет его.Формат по умолчанию для дат - yyyy-mm-dd.

Одним из решений является перевод формата при извлечении данных из Oracle с помощью TO_CHAR(FacHireDate, 'yyyy-mm-dd') или, возможно, путем изменения NLS-параметра NLS_DATE_FORMAT.Иначе, вы можете использовать функцию MySQL STR_TO_DATE() для перевода строки на дату: 

INSERT INTO Faculty VALUES (
    '543210987',
    'VICTORIA',
    'EMMANUEL',
    'BOTHELL',
    'WA',
    'MS',
    'PROF',
    120000.0,
    NULL,
    STR_TO_DATE('15/Apr/1998', '%d/%b/%Y'),
    '98011-2242'
);

С этими исправлениями скрипт работает нормально в это MySQL DB Fiddle .

0 голосов
/ 22 февраля 2019

В MySQL определение ограничения внешнего ключа должно включать имя столбца, а также имя таблицы (см. руководство ).Так, например, вам нужно изменить 

CONSTRAINT CourseFK FOREIGN KEY (CourseNo) REFERENCES Course

на 

CONSTRAINT CourseFK FOREIGN KEY (CourseNo) REFERENCES Course(CourseNo)
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